Underwater Cable Sabotage Detection
This is a news story, published by BBC, that relates primarily to Nato news.
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Subsea fibre cables can 'listen out' for sabotage
84% Informative
Subsea fibre cables can 'listen out' for sabotage using fibre optic signals to listen out for surreptitious underwater drones.
Nato has launched a mission called " Baltic Sentry " to patrol the Baltic Sea with aircraft, warships and drones.
Noticing a temperature change along part of a buried cable could reveal that part has become unburied.
There is also "armoury wire", thick metal cords, running along the outer parts of the cable.
But should a vessel deliberately drag its heavy anchor across even a double-armoured cable, it will almost certainly still damage it.
While it is possible to bury cables in the seabed for additional protection, this might become prohibitively expensive over long distances.